CN-121994491-A - Supporting device of engine combustion chamber test piece

CN121994491ACN 121994491 ACN121994491 ACN 121994491ACN-121994491-A

Abstract

The invention provides a supporting device of an engine combustion chamber test piece, which comprises a frame, a connecting structure and a supporting structure, wherein the connecting structure and the supporting structure are arranged on the frame, the connecting structure is connected with a connecting lug of the combustion chamber test piece so that the connecting structure can support the upstream position of the combustion chamber test piece, the combustion chamber test piece is pressed against the supporting structure so that the supporting structure can support the downstream position of the combustion chamber test piece, an elastic supporting piece is arranged in the supporting structure and can absorb vibration of the combustion chamber test piece in the radial direction, the supporting structure is provided with a sliding piece, and the combustion chamber test piece can be slidably supported on the sliding piece so as to transfer displacement of the combustion chamber test piece in the axial direction. The support device can absorb displacement in the axial direction and the radial direction.

Inventors

ZHANG WENJUN
MENG GANG
SUN YONGJUN
HE XIN
ZHANG JINGWEI

Assignees

中国航发商用航空发动机有限责任公司

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (10)

1. A supporting device of an engine combustion chamber test piece is characterized by comprising a frame, a connecting structure and a supporting structure, wherein, The connecting structure and the supporting structure are arranged on the frame; the connecting structure is connected with the connecting lug of the combustion chamber test piece so that the connecting structure can support the upstream position of the combustion chamber test piece; the combustion chamber test piece is pressed against the supporting structure, so that the supporting structure can support the downstream position of the combustion chamber test piece; An elastic support piece is arranged in the support structure and can absorb vibration of the combustion chamber test piece in the radial direction; the support structure is provided with a sliding part, and the combustion chamber test piece can be supported on the sliding part in a sliding manner so as to transmit the displacement of the combustion chamber test piece in the axial direction.
2. The support device of claim 1, wherein the combustion chamber test piece comprises two of the connection lugs; the number of the connecting structures matched with the connecting lugs is two; the center of gravity of the combustion chamber test piece is located in a plane formed by encircling the two connecting structures and the supporting positions of the supporting structures on the combustion chamber test piece.
3. The support device of claim 1, wherein the axial length of the frame is less than or equal to the axial length of the combustion chamber test piece.
4. The support device of claim 1, wherein the support structure is one or more; one or more of the support structures are disposed along an axial direction of the combustion chamber test piece.
5. The support device of any one of claims 1 to 4, wherein the attachment structure comprises a lug attachment and a fastener, wherein, The lug connection is provided with a slot for receiving the connection lug of the combustion chamber test piece; The connecting lugs are fastened and connected through the fastening pieces and the lug connecting pieces, so that the combustion chamber test piece is supported on the connecting structure.
6. The support device of claim 5, wherein the lug connection comprises a first connection block and a second connection block; The first connecting block and the second connecting block are connected with each other to form the slot; the first connecting block and the second connecting block are respectively provided with a connecting hole matched with the opening of the connecting lug; the fastener is capable of passing through the connection hole of the first connection block, the opening of the connection lug, and the connection hole of the second connection block to fasten the connection lug to the lug connector.
7. The support device of any one of claims 1 to 4, wherein the support structure comprises a support tank and the resilient support; The elastic supporting piece is arranged in the supporting tank body; the sliding piece is a rolling shaft arranged at the top of the supporting tank body, and a supporting sliding block is arranged on the combustion chamber test piece at a supporting position corresponding to the supporting structure; the supporting slide block is slidably supported on the roller, and further, the displacement of the combustion chamber test piece in the axial direction is transmitted.
8. The support device of any one of claims 1 to 4, further comprising a moving wheel assembly on which the frame is supported; The support device further comprises a height adjustment structure; the height adjusting structure comprises a limiting plate connected with the movable wheel assembly; the frame can be matched with the limiting plate, and then the height of the frame is adjusted.
9. The support device of claim 8, wherein the limiting plate is provided with a limiting aperture; The limiting holes extend in the height direction, and bolts can pass through the limiting holes and the connecting plates arranged on the frame to fasten the frame and the limiting plates; The position of the bolt in the limiting hole is changed so as to change the height of the frame.
10. The support device of claim 9, wherein the height adjustment structure further comprises a positioning assembly; The positioning assembly comprises a positioning bolt, a positioning nut and a bearing, and the bearing is connected with the positioning bolt and the frame; A positioning baffle is arranged at the top of the limiting plate; the positioning bolts penetrate through the positioning baffle plates, and the positioning nuts are in threaded connection with the positioning bolts and are tightly pressed on the positioning baffle plates so as to adjust the height of the frame.

Description

Supporting device of engine combustion chamber test piece Technical Field The invention relates to an aeroengine combustion chamber test, in particular to a supporting device of an engine combustion chamber test piece. Background In aero-engine and gas turbine combustor performance tests, it is necessary to place the combustor test piece on a test stand, which is typically a flat hardened ground or platform. Taking a full-ring combustion chamber test piece as an example, the weight of the test piece is about 2-5 tons generally, and a necessary supporting structure is needed to play a role in supporting and limiting in order to ensure the stability of the test piece on a bench. In the performance test of the combustion chamber test piece, thermal stress can be generated due to temperature change, and certain vibration and axial stress can be generated by the test piece due to aerodynamic force influence. However, current combustor test piece support schemes typically employ one or more sets of flange support means, i.e., the flanges of the test piece are lifted up by the arcuate contact end surfaces. The structural support point is limited, larger axial displacement, radial displacement and vibration generated by a test piece cannot be absorbed in the test process, the support is not firm enough, and clamping stagnation is easy to generate. Disclosure of Invention The invention aims to provide a supporting device of an engine combustion chamber test piece, which can absorb axial and radial displacement. The invention provides a supporting device of an engine combustion chamber test piece, which comprises a frame, a connecting structure and a supporting structure, wherein the connecting structure and the supporting structure are arranged on the frame, the connecting structure is connected with a connecting lug of the combustion chamber test piece so that the connecting structure can support the upstream position of the combustion chamber test piece, the combustion chamber test piece is pressed against the supporting structure so that the supporting structure can support the downstream position of the combustion chamber test piece, an elastic supporting piece is arranged in the supporting structure and can absorb vibration of the combustion chamber test piece in the radial direction, and a sliding piece is arranged on the supporting structure and can slide and support the combustion chamber test piece so as to transfer displacement of the combustion chamber test piece in the axial direction. In one embodiment, the combustion chamber test piece comprises two connecting lugs, the number of the connecting structures matched with the connecting lugs is two, and the gravity center of the combustion chamber test piece is located in a plane formed by encircling the two connecting structures and the supporting positions of the supporting structures on the combustion chamber test piece. In one embodiment, the axial length of the frame is less than or equal to the axial length of the combustion chamber test piece. In one embodiment, the support structure is one or more, and the support structure is/are arranged along the axial direction of the combustion chamber test piece. In one embodiment, the connecting structure comprises a lug connecting piece and a fastening piece, wherein the lug connecting piece is provided with a groove for accommodating the connecting lug of the combustion chamber test piece, and the connecting lug is fastened and connected with the lug connecting piece through the fastening piece, so that the combustion chamber test piece is supported on the connecting structure. In an embodiment, the lug connecting piece comprises a first connecting block and a second connecting block, the first connecting block and the second connecting block are mutually connected to form the slot, the first connecting block and the second connecting block are respectively provided with a connecting hole matched with an opening of a connecting lug, and the fastening piece can penetrate through the connecting holes of the first connecting block, the opening of the connecting lug and the connecting holes of the second connecting block to fasten the connecting lug to the lug connecting piece. In an embodiment, the supporting structure comprises a supporting tank body and the elastic supporting piece, the elastic supporting piece is arranged in the supporting tank body, the sliding piece is a roller arranged at the top of the supporting tank body, a supporting sliding block is arranged on the combustion chamber test piece at a supporting position corresponding to the supporting structure, and the supporting sliding block is supported on the roller in a sliding mode so as to transfer displacement of the combustion chamber test piece in the axial direction. In one embodiment, the supporting device further comprises a moving wheel assembly, the frame is supported on the moving wheel assembly, the supporting device further compri